When you invite a girl to do something a few days in advance and she doesn't even respond what should you do (this is over text)?

I've only had this happen a few times with girls when offering an extra ticket, or some kind of other idea, event or plan. This time is strange as we've hung out plenty of times before. But what is the deal with this is it an attempt at a power move?

What is the best response to this? Just say nothing and delete the number? Ask one more time the day before? Something else?